Nut-tapping machine.



T. IvI. DANIELS a. I. C. HOLSGHEIVIACHEIT.

NUT TAPPING MACHINE.

APPLICATION FILED SEPT. 22, I9I4.

Patented June l, 1915.

3 SHEETS-SHEET l- IITIL W/T/VESSES T. M. DANIELS & J. C. HULSCHEMACHER.

NUT TAPPING MACHINE.

APPLICATION FILED SEPT. 22. |914.

Patented June 1, 1915.

3 SHEETS-SHEET 2- emafw A TTOHNEYS 4 T. M. DANIELS & j. C. HOLSCHEMACHER.

NUT TAPPING MACHINE. APPLICATION man SEPT. 22. 1914.

w .INH ,.NLQ Mm www mm M@ m3 SV/ @a m W f I |V///// f4 NORA/EVS `THOMAS MARION DANIELS AND JULIUS C. HOLSCI-IEMACHER, 0F CHICAGO, ILLINOIS,

ASSIGNORS, BY MESNE ASSIGNMENTS, TO DANIELS SAFETY DEVICE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

NUT-TAPPING MACHINE.

Specification of Letters Patent.

Patented J une 1, 1915.

Application filed September 22, 1914. Serial No. 862,876.

To all whom 'it may concern Be it known that we, THOMAS M. DAN- IELs and JuLrUs C. HOLSCHEMACHER, citizens of the United States, and residents of Chicago, in the county of Cook and State of Illinois, have invented certain new and volving passing a tap entirely through a nut, and afterward returning the same to initial, nut engaging, position.

A further object is to provide such a machine which is very speedy in operation and, therefore, of great capacity.

A further object is to provide such a machine which is readily adaptable to various sizes of nuts, and to various pitches of threads; and further objects are to provide such machines which are simple in construction, positive in operation, self-lubricating, and comparatively inexpensive.

Our invention is fully described in the following specification, of which the accompanying drawings form a part, in which like parts are designated by the same reference characters in each of the views, and in Whichzy v Figure 1 is a side elevation of our nuttapping machine, partly in section on the line 1-1 of Fig. 3; Fig. 2 is a side view thereof, partly broken away; Fig. .3 is a section taken on the line 3'3 of Fig. 1; Fig. 4 is an enlarged section on the line 4 4 of Fig. 2; Fig. 5 is a similar section on the line 55 of Fig. 2; and Fig. 6`is a similar section on the line 66 of Fig. 1.

In the drawings forming a part of this application we have shown a present preferred form of embodiment of our invention, comprising a suitable frame 7, legs 8, a central, vertical, shaft 9, carrying two carriers 10 and 11 keyed thereto, two bevelgears 12 and 14, the former keyed thereto and the latter keyed, as shown at 15, to a spur-gear 16, a bevel pinion 17 enmeshed insure a uniformA thread entirely through the nut, this in-` with said bevel-gears andv revoluble with a counter-shaft 18 having a worm-gear 19 on its outer end enmeshed with a worm 2O on the drive-shaft 21, and it will be seen that the carriers 10 and 11 and bevel gear 12 revolve with the shaft 9, whereas the bevelgear 14 and spur-gear 16 revolve in the opposite direction.

At the top of the machine is a support 22 for a plurality of hangers 23 carrying a cam 24 at their lower ends, said hangers being individually adjustable, in any desired manner, whereby the inclination of the cam 24 may be adjusted with respect to the support 22, this adjustment being a material factor in adapting the machine to different pitches of threads in the nuts, and we also provide a separate cam 25, Fig. 2, bridging the gap between the ends of the metal band forming the cam 24.

The carrier 10 is provided with a plurality of vertically arranged tubular guides 26 on the periphery thereof and extending above and below the same, being enlarged intermediate the height of each guide, as shown at 27, Fig. 1, to receive a pinion 28 enmeshed with the spur-gear 16, a spinthrough for a vrod 30 normally held in uppermost position by means of a spring 31 bearing upon a flange thereon and upon a threaded plug 32 in an enlarged head of the spindle, said spindle being peripherally grooved in its upper end, at 33, to receive a collar 34 provided with a roller35 grooved to engage With the lower edge of the cam 24, normally, and with the cam 25 under conditions to be described, `and we may, if desired, employ a spring 36, indicatedin dotted lines in Fig. 1, for maintaining the spindle in contact with the cam 24.

The lower enlarged head of each spindle is recessed to receive two members 37 and 38 of a clutch for a tap 39, said, members being held in position by means of pins 40 and springs 41, Fig. 6 and the interior, lower, edges of which are rounded to permit the entry of the angular end of the tap, this being clearly shown in Figs. 4 and 5.

The carrier 11 has a plurality of recesses formed in the upper face thereof in absolute register with the positions of corresponding spindles, a nut receiving block42 being arranged lin each recess, and each of said blocks is removable whereby it may be substituted by another adapted for a larger or smaller nut, and whereby it may be turned upside down for a reason later explained Beneath each of the said blocks 42 is a tubular, slotted, guide 43 for a tube 44 provided with a pin engaged in said slot to prevent the rotation of the tube in the guide but`permitting its vertical movement therein, a transverse rod 45 being provided in the lower end of each tube 44 to permit shavings to fall therethrough but preventing a corresponding bit from falling therethrough, each tap being preferably transversely grooved, as shown in Figs. 1, 4 and 5, at its lower end to engage with said rod 45 and thus maintain its relationship with the clutch from which it has been forced, as will be later explained. We also lprovide a supplemental tube 46 within each tube 45 which is adapted to be substituted byan` other of a proper internal diameter when larger or smaller taps are employed, and we also provide a roller 47 at the inner side of the lower, exterior, end of each tube 44.

Mounted upon a suitable support 48, Fig. 2, is a cam or incline 49 arranged in the path of the rollers 47, and adjacent thereto is a complemental cam or incline 50 also in the path of said rollers, and the reason for which will be later set forth.

A-As shown in Figs. 1, 2 and 3, we; provide a feed chute 51 forthe nuts to be tapped, an extension 52 being provided thereon for nut guidance and slotted at 53 to allow the downward passage of the taps to the nuts, a pin 54 limiting the movement of said nuts toward the center of the machine, and a suitable spring, not shown, forcing the nuts against their corresponding pins, said spring being within the chute extension, and this extension is made of a length insuring tap engagement with a nut before the nut leaves said extension, after which the nuts are held in position by the respective taps.

At 55, Fig. 3, is shown an arm which is arranged slightly above the horizontal plane of the upper surfaces of the nut blocks 42,.

as clearly shown in Fig. 2, but lower than the upper surfaces of the nuts, and this arm tends to force the nuts outwardly from their resting places, away from the machine, after having been tapped.

We also provide a lubricant reservoir 56, partially shown in Figs. 1 and 3, on the inner side of the taps 39 and having a suitable spout for directing lubricant upon the nuts being tapped, as many spouts as are desirable being employed, and we also provide an exterior reservoir 57 for the same purpose, said reservoirs being connected with a supply pipe 58 by means of pipes 59 and 60, respectively. A

The untapped nuts, shown at 61, are fed through the chute 51 and to their respective seating blocks 42 and are carried along with vthe carrier 11, but the carrier 10 moves therewith, with the result that the spindles 29 are successively moved downwardly because of the cam 24 to move the taps 39 into the corresponding nuts; the spur-gear 16 is meanwhile revolving in an opposite direction, resulting in the rapid rotation of the spindles and taps, and thus cutting the threads in the respective nuts.

When the thread of a nut has been completed the carriers 10 and 11 have the nut and tap through an arc of a circle which brings them under a cam 62 adjustably hung` from the support 22, the top-of the rod 30 in the spindle being forced downwardly upon contact with this cam, and the tap is released from its clutch and falls into the tube 44; immediately thereafter, the arm 55 strikes against the inner side of the tapped nut and forces it out of themachine and into a suitable receptacle not shown; when the nut has been removed, the' roller 47 of the tap carrying tube 44 strikes against the cam 49 and said tube is forced upwardly and thereby forces the tap back into its clutch, the members 37 and 38 thereof yielding because of their springs'41; the roller 47 then leaves the cam 49 and impinges on the cam 50 which moves the tube 44 downwardly into initial position; at the same time, the roller 35 on the spindle strikes the rise of the bridging cam 25 and is carried upwardly into initial position, and into contact with the cam 24, the tap now being ready for another nut which will be seated beneath said tap by the time it is again forced downwardly by the cam 24, and this operation is repeated for all the spindles and taps, of which there may be any number, but corresponding to the number of nut seating blocks 42.

In the event of a shortage of taps, or the absence of several from the machine, the corresponding` blocks 42 may be removed, turned upside down. and replaced, thus blocking oil'l the exit from the nut chute 51, and no nuts are fed thereto; in Fig. 2 we have shown al spring 63 for the cam 49, said cam being pivoted at 64, v,whereby it may yield slightly to the pressurefofthe rollers 47. It will thus be seen that each of a plurality of nuts are successively engaged, a tap forced therethrough, and throwmfnfrom the machine, and said machine receives said taps for taps of different sizes, and lfor different pitches of .screw-threads, it being necessary to change the degree of inclination .of the cam 24 for different screw pitches, and this is easily possible because of the adjustable hangers, the approximate adjustment beingV secured by loosening the bolt in theA slots thereof, and the accurate adjustment by means of the screws above said hangers, but other means vmay, be employed, as well as other changes in the details shown and described. e

With a reservation to ourselves of all such changes as will come within the scope of the following' claims, what we do claim as new, and desire to 4secure by Letters Patent, is

1. A nut tapping machine, comprising a support, a revoluble nut carrier, means for engaging each of a plurality of nuts thereon, a spindle carrier, a rotating spindle over each nut, 'means for revolving vsaid carriers simultaneously," a tap held in each spindle,

positive means for forcing said spindles downwardly to force said taps into nutengagement, a slidablerod in each s indle projecting thereover and restin on t e tap, andl a cam lfor forcing said rods ownwardly successively to force the corresponding taps out of said spindles.

2. A nut tapping machine, comprising a support, a revoluble nut carrier, means for engaging each of a plurality of nuts therelon, a revolving spindle carrier, a rotating spindle therein over each nut, a tap in each spindle, a cam 'for forcing said spindles I downwardly to carry said taps into nut engagement, a slidable rod in each spindle projecting thereover and bearing on the tap,

and a cam for forcing said rods downwardly successively to force the corresponding taps out of said spindles.

3. A nut tappin machine, comprising a support, a revolub e nut carrier, means for engaging each of a pluralit of nuts thereon, a spindle carrier, means or revolving the same, a rotating spindlepover each nut, a tap in each spindle, a cam for forcing said taps into nut engagement, a rod slidable in each spindle projecting thereover and resting on the tap, a cam for forcing said rods downwardly successively to force the corresponding tapsout of said spindles, and means 'for returning said taps to said spindles.

4. A nut tapping machine, `comprising a support, a revoluble nut carrier thereon, means for holding each of a plurality of nuts thereon, a revoluble spindle carrier, a plurality of rotating spindles therein, a tap in each spin'dle over the corresponding nut, a cam for forcing said taps into`nut engagement, a cam`for forcing'said taps out of said spindles and clear of the respective nuts, a tubular vreceiver for each tap beneath each nut, means for removing the tapped nuts from their carrier, and a cam for raising said receivers successively to return said taps to their respective spindles.

In testimony whereof we have signed our names to this speciication in the presence` of two subscribing witnesses.

THOMAS MARION DANIELS. JULIUS C. HOLSCHEMACHER.

Witnesses: i

MAX FREICHEL. WILLIAM B. Rosa.

Copies of this patent maybe obtained for five cents each, by addressing the Commissioner of Patents, Washington, '.D. C. 

